Hello,
I've noticed with recent kernels that I'm getting a lot of wierd looking
tcp options send with every packet when telnetting or rlogging to another
NetBSD system. Has anyone else seen this? I discovered it because it really
slowed down interactive performance over a PPP link. Is it a bug?
- Tim Chase
tim@introl.com
PS: Here's an example from tcpdump (run through fold to avoid a long line).
This was from a rlogin session on pokey.introl.tom to rdp.introl.com.
Most of the packets don't have quite so many options.
10:20:49.338031 rdp.introl.com.login > pokey.introl.com.1021: P ack 33 win 8760
<nop,eol,eol,eol,eol,eol,opt-93:39795de8c484f82dc63f0400420000004200000012000000
c0c0db10000000913835080045103400c91a00003f068935c07c2b61c07c2b5c020103fd5bde8e0d
6979f41a80102238d5f800000101080a00005e0a0002fb4bc484f82d134204004400000045000000
12000000009138350000c0c0db100800450037000621000040068205c07c2b5cc07c2b6103fd0201
6979f41a5bde8e0d80182238048f00000101080a0002fb4b00005df86170080a00005c880002f9c8
756902010384f82dafe20200420000004200000012000000009138350000c0c0db10080045003400
e41f00004006832ac07c2b5cc07c2b6103fd020167f8> [tos 0x10]
Here's one with fewer options and in the opposite direction:
10:20:52.058104 pokey.introl.com.1021 > rdp.introl.com.login: . ack 324 win 8723
<nop,nop,opt-8:0002fb6b00005e29>
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